<template>
  <el-container class="home_container">
    <!-- 头部 -->
    <el-header>
      <div>
        <img src="../assets/heima.png" alt="" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <el-container>
      <!-- 侧边 -->
      <el-aside :width="iscollapse? '64px':'200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <el-menu
          background-color="#545c64"
          text-color="#fff"
          active-text-color="#3b93f6"
          unique-opened :collapse="iscollapse" :collapse-transition="false" router :default-active="activePath">
          <!-- 一级菜单 -->
          <el-submenu :key="item.id" :index="item.id + ''" v-for="item in menuList">
            <!-- 一级菜单模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :key="subItem.id" v-for="subItem in item.children" :index="'/' + subItem.path" @click="saveNavState('/' + subItem.path)">
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
    data(){
        return {
            // 左侧菜单数据
            menuList : null,
            iconsObj:{
                '125' : 'iconfont icon-user',
                '103' : 'iconfont icon-tijikongjian',
                '101' : 'iconfont icon-shangpin',
                '102' : 'iconfont icon-danju',
                '145' : 'iconfont icon-baobiao',
            },
            iscollapse:false,
            // 被激活链接地址
            activePath:''
        }
    },
    created() {
        // 在created阶段请求左侧菜单数据
        this.getMenuList()
        this.activePath = window.sessionStorage.getItem('activePath')
    },
    methods: {
    logout() {
      // 清除sessionStorage
      window.sessionStorage.clear();
      // 跳转到login 页面
      this.$router.push("/login");
    },
    // 获取所有的菜单
    async getMenuList() {
        // 发送请求获取左侧数据
       const {data:res} = await this.$http.get('menus')
        if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
        this.menuList = res.data
        console.log(res);
    },
    // 切换菜单折叠按钮
    toggleCollapse() {
      this.iscollapse = !this.iscollapse
    },

    // 点击菜单高亮显示
    // 形参是 subItem.path 的地址
    saveNavState(activePath1) {
      window.sessionStorage.setItem('activePath',activePath1)
      this.activePath = activePath1
    }
  },
};
</script>

<style scoped lang="less">
.home_container {
  // width: 100%;
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu {
      border: 0;
  }
}
.el-main {
  background-color: #eaedf1;
}
.iconfont {
    margin-right: 10px;
    
}
.toggle-button {
  background-color: #4A5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  cursor: pointer;
  letter-spacing: 0.2em;
}
</style>
